Double-drum hoist



1,574,912 E. B. LEAR DOUBLE DRUM HOIsT Filed 0pt. 5, 1925 3 sheets-Sheet l March 2 1926.

March 2 1926. 1,574,92

E. B. LEAR DOUBLE DRUM HOIST Filed oct. '5I 1925 5 sheets-sheet 2 B K u NVENTOR Ear/, Lean HIS ATTORN v March 2 1926 1,574,912 E. B. LEAR DOUBLE DRUM HOIST Filed Oct. 5, 1925 3 Sheets-Shea?. 3

INVENTOR E Q21/ Le ai@ m5 ATTOR Y l I Patented Mar. 2, 192e.

UNITED STATES4 l1,574,912 PATENT OFFICE.

EARL B. LEAR, OF PHILLIPSBURG, INEW JERSEY, ASSIGNOR-TO INGERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

Donau-Daum nors'r.

Apbncation inea october 5, 1925. serial upf 60,378.

To all whom t may concern:

Be it known that I, EARL B. LEAR, a citizen of the United States, and a residentof Phillipsburg, county of Warren, and State of New Jersey, have invented a certain Double-Drum Hoist, of which the following is a specification, accompanied by drawings.

This invention relates to hoists, but more particularly to a power driven hoist of the double drum type. o

One object of the invention is to enable two drums, as for instance, a haulage drum and a tail rope drum to be driven from a common source of power.

Another object is to arrange the source of power between the drums for actuating the hoist. A further object is to automatically connect one or the other of the drums with a common source of power in accordance with the direction of rotation of the power element.

Other objects will in part be` obvious and in part pointed out hereinafter.

The invention consists of the combinations of elements, features of construction and arrangement of parts having the general mode of operation substantially as hereinafter described and more particularly pointed out in the appended claims and illustrated in the accompanying drawings, in which-v 4 Figure 1 is a longitudinal view in elevation, partly in section, of a hoist of the double drum type showing one of the drums connected to be rotated by the driving shaft,

Figure 2 is a view simil-ar to Figure 1 showing the other drum connected to be driven by the driving shaft, and

Figure 3 is a transverse view through Figure 1 looking inthe direction of the arrows.

Referring to the drawings, the base plate A which supports the hoist is mounted on a bed plate B to enable the hoist to be rotated about a vertical axis for locating said hoist with respect tol the work. Any suitable means may be employed for clamping the hoist to the bed plate, in this instance a bolt C is shown. In-addition toserving as a means for clamping the hoist on the bed plate, the bolt C may also serve as a pivot about which the hoist m-ay be rotated.

Disposed on opposite sides of the base plate A are end frames D and E. Gear casings F and G are preferably formed integrally with the frames D and E respectively and are provided with suitable covers H and J for sealing one side of saidcasings. The covers H and J are held in place by suitable bolts K. In Iaddition to sealing the ear casings, the covers I-I and J also provi e a support for opposite ends of ,a driving shaft L. In this instance the driving shaft L is formed in two parts and is preferably provided at its-ends with frictionless bearings O arranged in the gear casings H and J.

In accordance with the present invention, a motor, which is preferably of the type disclosed in the pending U. S. application of Fred M. Slater for a gear motor, Serial No. 56,681 tiled Sept. 16, 1925, assigned to the Ingersoll-Rand Company, assignee ofthe present invention, is arranged on the shaft L intermediate the frames D and E. The motor illustrated is of the gear type having the gear P and pinion Q encased by a casing R and side covers S and T. In this instance the gear P is keyed to-a bushing U having a rectangular bore V to receive correspond- Y are provided for the pinion Q and are journalledv on a stationary shaft Z about which the pinion Qrotates.

Motive Huid for actuating the motor is admitted through a connection b (Figure 3) and is controlled by a suitable throttle valve (not shown) in a valve chest o having a throttle lever d. Ports e and f leading from the valve chest c sup ly motive-fluid to the gear P and pinion (S are so arranged with respect to each other than when motive uid is ladmitted throu h one port or set of ports for driving t e motor in one direction, the other port or set of ports will serve as exhaust ports.

Pillars g and z, preferably formed tegrally with the motor covers S and T are secured to the frames D and E respectively by means of screws 7c and provide a convenient bearing for a h-aulage drum o and a tail rope drum p located on opposite sides of the motor.

In order to connect the drums o and p to be drivenby the driving shaft L, an internal gear is preferably formed integrally with the anges er' of said drums to mesh with intermediate pinions s carried by countershafts t. The countershafts t are provided with frictionless bearings u and lv in the The ports e and f y ed on eac sliding the intermediate gears l frames D and E and the covers H and mediate gear" on the haulage drum side-of out of engagement respective A clutch member w is mountthe hoist will be moved countershaft t and is secured with itsclutch member/w. fthereto (preferably by a key w. Intermediate The advantages of the invention consists `s yiralle gears y are arranged loosely on in the fact that a hoist constructed in acte countershafts t and mesh with s ira] cordance with the foregoin description is p nionsa on the outer lends of thesha L. well balanced and is rigid'm construction. The'intermediate spiral gears y are arranged Another advantage is one drum or its drivslidably on the countershafts t and carrying mechanism ma be disassembled without .clutch teeth 2 adapted to cooperatel lwith disturbing the ot er drum or its driving the ciutch members w for connecting the mechanism. A still further advantage is drums with the driving shaft. thatthe parts comprising the drivingele- Usually inhoists ofthis type, a brake is ments for the drums are symmetrical and provided toprevent rotation of the drums are therefore interchangeable.

when oneor the other of said drums is dis- 4 I claim: connected from the driving shaft. In this In arhoist, the combination of a frame, instance, a separate brake is provided' for a driving shaft supported by the frame, a

each drumand brake bands 3 are accordpair of drums rotatable about'said driving' i ingly arranged about the anges 7' .of the shaft, a fluid actuated motor between the drums o an p to encircle said flanges. The drums, intermediate gears for connecting the Secured to' a pin 5 which lalso serves as a pivot means for automatically. shifting said gears for an eye-bolt 6 upon which the other end to connect one or the other of said drums 7 of said .bands'is secured slidably. Sprin s .with the driving shaft in accordance with the 8 are disposedon the-bolts 6 to constanty direction of rotation of said motor.

force thev endsl 7. ,of the bands 3 outwardly 2. In a hoist, the combination of a frame, against the'lthumb nuts -9 and cause the' a drivin shaftsupportedrby the frame, a bands to gripthe flanges wwhen the drums pair Aof drums rotatable about' said driving tend .to rotate in one direction. Whenever shaft, a fluid actuated motor between the the drums rotatein the opposite direction, drums, intermediate ars for connectin the the drumsactng a ainst the brake bandsf' drums tobe rotate by the driving s aft, will tend'to raise t efree endsofrthe eyebolts an'dfthus release'the friction of th- 'gears to connect one or the other of; said bands upon :said flanges.l

drums 'with the driving shaft ino accordance :.-Mea-ns are .provided for simultaneously with the direction of rotation of said motor. y. and tohold 3 .In 'a' hoist, the combination of a frame, "said in spaced relation with respect to a drivin shaftzsupported by the frame, a

each other. To this end aninwrdly ei'xte'nd-AA pair of. rums rotatable about said driving ilo secured??? its endete the frames D vand E, jllpieferably beneath the drums vo and p. The. A-n IQdIZQIS'promded at one endw-ith a groove f "cured on theI other end of said rod-and with' said motor..

ffa screw A1.6 ,forms a' similar groove 14 to' i engjngelthe angen the other gear y.

shaft, 'a fluid actuated motor betweenthe drums, intermediate'gears for. connecting the drumsto be rotated 'by the driving shaft,

one end of the'bands 3 is in this instance drums to be rotated by the driving shaft, and

anda rod for aiitomatically shifting said and a collared rod vfor automatically `s'hift-.4

ing said gears toiconnect one' :or ytheother 14; tggfngage the flange 10 of .one .gear y. A of said drums withthe driving shaft in .ac-

collar` 15'l is pres tted or'.l otherwise se-"cordance'with the direction of rotation ofY 4. Ina hoist, the Y 'aA :driving shaft supported by-the Jframe, a

n tY el operation of fthe device assuming pair of drums `rotatable aboutsaid driving that the haulage drum is being-rotated v4as shaft, a -iuid actuated motor between the .indicated in Figure 1 and that it be ldesired drums, an intermediatev gear at each end of to disconnect the haulage drumv o from the the hoist for connecting the `drums to be rodriving shaft. and to connect the tail ropej" tatedby'the driving shaft, a ange on each to position for admitting thepressure Huid of the drums with the driving shaft and si e .drum p vto be driven by the driving shaft gear, and a collared red cooperating with L the'throttle lever'd may then be moved the anges for' automatically connecting one through the. port f to cause theshaft L to multaneously disconnecting the other said rotate in' the 4direction ofthe 'arrow 17 in' drum from the driving shaft 1n accordance .Y

vso

l intermediate .Figure 3. lWith the shaft L rotatingin this^ with the' .direction of rotation of the motor.

diiectionz @the spiral pinions z willfforce the 5. In a hoist, the combination of a frame. fgears fz/ in the direction of the a driving` shaft A'supported by the frame, a cover J; and orge theclutch teeth 2 into enfpair of drumsa rotatable about said driving ga mentjwitlitlie'clutch member/won the shaft, a fluid actuated motor between the ta' rope" dru1n"sid of .the hoist. Simuldrums, an intermediate gear at each end ofl f taneouslyy the clutch teeth 2 on the interthe hoist for connecting the drums to be rocombination of va' frame,

lll

iso

ramera tated by the driving shaft, an inwardlyexf tending 4flange on each gear, and a lonitudinally slidable collared rod engaging t e flanges whereby the gears may be shifted simultaneously to connect one of the drums to be rotated by the driving shaft and to disconnect the other drum from the driving shaft in accordance with the direction of rotation of the motor.

6. In a hoist, the combination ofa frame,

a driving shait supported by the frame, a

pair of drums rotatable about said driving shaft, a fluid actuated motor between said drums for, rotating the drums, a casingfor said motor, means on the casing to form bearings for the drums, intermediate gears for connecting the drums to be'rotated by `the driving shaft, and a rod for shifting the gears to connect one or the other of said drums with the driving shaft 1n accordance with the direction of rotation, of the motor.

7. In a hoist, the combination of a frame,

, a driving shaft supported by the frame, a

pair of drums rotatable about said driving shaft, a fluid actuated motor between said drums for rotating the drums, a' casing for said motor comprising side covers, means on said side covers to form bearings for the drums, intermediate gears for connectin 'the drums to be rotated by the driving s aft, and a rod for shifting the gears to connect one or the other of said drums with the driving shaft in accordance with the direction of rotation of the motor.

8. In lal hoist, the combination of a frame, a driving shaft supported by theV frai'ne, a pair of drums7 rotatable about said driving shaft, a uid actuated motor between lsaid drums for rotating the drums, a casing for `said motor comprising side covers, hollow pillars on the side covers to form bearings for the drums, intermediate gears for connecting the drums to be rotated by the driving shaft, and a rod for shifting the gears toconnect onejo'r the other of said drums j with the vdriving 'shaft in accordance with the direction of rotation of the motor. l

9; In ahtst," the'combination of a frame, a driving shaft supported by the frame, 'two drums rotatable about the driving shaft, a fluid actuatedA gear motor between the drums, a. gear casing at each end of the hoist, a

counterash'ait in each casing, an intermediate` gear on each shaft connected to transmit ro- Atationof-the driving shaft to 'a drum', clutch teeth on said gearsa clutchmember keyed .on each counter-shaft, and a slidable rod connecting the vgears whereby the clutc'h teeth on one gear are moved outof engage-` ment with one clutch .member while the clutch teeth'onvthe other gear are simultaneously moved .into engagement with the other clutch member in accerdance with the direction of rotation of the motor. v

10. In a hoist, the combination of a frame,

a driving shaft supported by the frame, al

spiralled pinion ateach end of the driving' moved out of engagement with one clutch member while the c utch teeth on the other gear are simultaneousl moved into engagement with other clutc member in accordance with the direction of the rotation of the motor.v In testimony whereof I have signed this specification.

EARL B. LEAR.- 

